Giles j



(Ho'ModqL) wan moo co- J. HOLBROOK,

EOLIAN HARP.

Patented Mar. 1, 1887,

UNITED STATES PATENT OFFICE.

GILES J. HOLBROOK, OF JERSEY CITY, NEW JERSEY.

EOLIAN HARP.

SPECIFICATION forming part of Letters Patent No. 358,448, dated March 1, 1887.

Application filed March 26, 1886.

T0 aZZ whom it may concern:

3e it known that I, GILEs J. HoLBRooK, a citlzen of the United States, residing at J ersey Oity,.in the State of New Jersey, have inwhatever size or mode of construction.

The instrument itself is formed in the usual manner, being a box with a suitable sounding-board and provided with strings regulated as to tension by means of pegs or keys.

The extension attachments and the adj ustment of the instrument in position are illustrated by the accompanying diagram, in which similar letters refer to like parts in all the vlews.

Figure 1 is a side view of the instrument in position under the window, as seen from the outside. Fig. 2 is a top view of the same, showing the perforations and the strings in position. Figs. 3 and 5 are end views. Fig. 4. is a sectional side view of one end of the instrument as seen from within.

In the different views, A is the instrument. 13 is the window-sash, with a section of the lower side of the same removed to show the strings of the instrument; 0, the window-sill; D, a sliding extension or attachment, and E a telescopic attachment.

Referring to Fig. 1, the extension E is formed of three sections, a b a, each of which is formed of thin metal plate, the upper and lower edges of a being bent so as to clasp the upper and lower edges of b, and I) having the same arrangement with relation to 0, so that 0 slides readily to right and left in b, and I) in a.

The extension D is a single piece of very thin board or metal plate sliding back and forth longitudinally in a clasp, d, which is formed of a belt of thin spring metal extending across the inner side of said extension, as seen in Fig. 4, with its ends bent around the upper and lower edges thereof, as shown in Fig. 1.

The extensions D and E are attached to the instrument by means of the angle-plates e e, which are clearly shown in Figs. 2 and 4.. In

Serial No. 196,617. (No model.)

these angle-plates is a perpendicular slot, f, which is shown in Fig. 4. Through this slot the set-screw g is passed and screwed through the clasp d of extension D and into the rib of the extension E. By means of these slots and set-screws the extensions can be fixed at a higher or lower elevation, so as to conform to the rabbet of the windowsill, and by means of the longitudinal adjustment they can be extended. to comprise the entire width of the window, thus closing the openings at the ends of the instrument and excluding all air except that admitted on the strings thereof.

The thumb-screws t j are designed to support the sash and regulate the extent of the opening between the sash and the instrument for the admission of air, and the thumb-screws 7; Z, one of which is placed at each end, and, if need be, one at each corner of the instrument, serve to adjust it to window-sills of different designs and give to it a degree of inclination best adapted to secure the desired effect of the air upon the strings.

\Vhat I claim is- 1. In combination with an zeolian harp, one or more adjustable longitudinal extensions, substantially as described.

2. In combination with an aeolian harp, one or more longitudinal extensions adjustable perpendicularly, substantially as set forth.

3. In combination with an zeolian harp, one or more wings formed of thin pieces of wood or metal, held by an adjusable clamp attached to a slotted angle-piece, substantially as shown, and for the purpose specified.

4. In combination with an aeolian harp, one or more wings, each composed of two or more plates or sections so arranged as to slide one on the other, and attached to a slotted anglepiece, substantially as set forth.

5. In combination with an aeolian harp, one or more adj ust-able pins to support the winsion of air.

6. In combination with an aeolian harp, one or more adjustable legs to support the harp and vary its inclination, all substantially as described, and for the purposes above set forth.

GILES J. HOLBROOK.

Witnesses:

SoL. OPPENHEIMER,

C. H. DENIsoN.

dew and regulate the opening for the minds ICO 

